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Rudd JR, O'Callaghan L, Williams J.Rudd JR, et al.Int J Environ Res Public Health. 2019 May 10;16(9):1630. doi: 10.3390/ijerph16091630.Int J Environ Res Public Health. 2019.PMID: 31083281Free PMC article.
Downs SJ, Boddy LM, McGrane B, Rudd JR, Melville CA, Foweather L.Downs SJ, et al. Among authors: rudd jr.BMJ Open Sport Exerc Med. 2020 Nov 19;6(1):e000902. doi: 10.1136/bmjsem-2020-000902. eCollection 2020.BMJ Open Sport Exerc Med. 2020.PMID: 33324486Free PMC article.